In　order　to　study　the　aseismic　performance　of　prefabricated　light　steel　frame　with　light　steel　truss　structure　and　the　seismic　failure　mechanism　of　truss-type　L-shaped　column,　full-scale　shaking　table　tests　were　performed　on　a　two-story　building　model.　Seismic　waves　in　42　events　were　input　to　model　structure.　The　dynamic　properties　of　model　structure　was　quantified　by　model　analysis　theories.　The　change　regularity　of　acceleration　responses,　displacement　responses,　and　strain　responses　were　analyzed.　Results　show　that　with　the　peak　acceleration　of　seismic　waves　increasing　from　0.07g　to　0.9g,　both　the　fundamental　frequency　and　the　acceleration　magnification　factor　of　the　structure　decreased　gradually.　The　maximum　inter-story　drift　occurred　in　the　first　floor,　and　the　maximum　inter-story　drift　ratios　under　basis　ground　motion　and　rare　ground　motion　of　8-degree　was　1/268　and　1/164,　respectively,　which　were　lower　than　the　elastic　and　elastic-plastic　inter-story　drift　ratio　limits　of　multistory　steel　structure.　The　model　structure　can　basically　satisfy　the　two-phase　and　three-level　seismic　fortification　requirements.　The　truss-type　L-shaped　column　in　the　model　was　in　elastic　state　under　basis　ground　motion　of　8　degree.　Crack　was　found　at　the　junctions　between　end　column　and　diagonal　member　under　rare　ground　motion　of　8　degree.　At　the　same　time,　the　L-shaped　column　enter　plastic　stage,　although　the　plastic　drift　increased　under　rare　ground　motion　of　9　degree　and　a　certain　safety　margin　was　remained.　The　lateral　stiffness　of　L-shaped　column　degraded　severely　under　very　rare　ground　motion　of　9　degree.　After　the　gradual　process　of　plastic　deformation,　the　L-shaped　column　retained　a　certain　level　of　carrying　capacity,　so　it　has　good　ductility　and　can　be　used　in　seismic　fortification　region　of　high　degree.　©　2019,　Editorial　Board　of　Journal　of　Harbin　Institute　of　Technology.　All　right　reserved.